Submitted by cmichel
As the return value of ERC1155.balanceOf was changed to a signed integer, the nERC1155Interface does not implement the ERC1155 interface and the supportsInterface call will return false if people call it with the actual ERC1155 interface ID.
Not all users of the contract might care about the balance function and call supportsInterface with the original EIP1155 interface.
The contract will still deny the [content missing]
It is indeed debatable if this contract should be considered implementing ERC1155 and what the correct return value of supportsInterface(ERC1155.interface) should be for compatibility.
Users need to be aware that this contract is not standard compliant and that the supportsInterface call will fail.
jeffywu (Notional) confirmed
